House extensions
Explore the practical questions involved in creating additional space and connecting it to your existing home.
Explore this service →Explore BSL
Building Services London
Building, refurbishment and structural improvement services for homes and commercial premises across London and surrounding M25 areas.

The service
Building Services London offers residential and commercial building and refurbishment services across East, North, South and West London and surrounding M25 areas. Whether you want to create more room, rework an existing space or improve a business property, the starting point is the work your building needs and the result you want.
Our service range includes house extensions, loft conversions, commercial refurbishment and fit-outs, and structural steelwork. Kitchens, bathrooms, glazing, interiors and building systems can also form part of a wider project. Identifying these connections early helps you describe the complete scope rather than treating every improvement as an isolated job.
You can enquire with initial ideas. Share the property location, the changes you have in mind and any information already available. Drawings and photographs are helpful if you have them, but they are optional for an initial conversation.
Explore the scope
Explore the practical questions involved in creating additional space and connecting it to your existing home.
Explore this service →Consider how additional accommodation could fit within the roof space and the layout below.
Explore this service →Refresh or reorganise residential and commercial spaces to suit the people who use them.
Explore this service →Discuss steelwork requirements as part of building alterations, with the relevant project information.
Explore this service →Before you enquire
Think about the rooms you use most, where the layout feels restrictive and whether the priority is space, daylight, storage or a different finish. These goals help explain why you are considering the work.
An extension or refurbishment may also involve decisions about flooring, joinery, glazing and heating. Mention any connected improvements so they can be considered together.
Explore residential services →Describe how the premises are used, which parts need changing and any access or operating constraints. If work needs to take account of an occupied building, include that in the enquiry.
Prioritise the areas that affect day-to-day use. A clear description helps establish what further information is needed to discuss a quotation.
Practical considerations
Scope, existing conditions, access, materials and the extent of specialist input can all affect a building project. Establish what information is available and what still needs to be resolved before agreeing work.
Any required drawings, technical design, permissions or inspections should be identified for the proposed scope. Do not assume that a quotation includes professional services or approvals unless this is expressly agreed.
For a useful initial enquiry, include your postcode and a short description. If you have preferred timing or a budget range, you can share those too. BSL offers free quotations; the applicable scope and guarantee terms should be set out with the proposed work.
Planning the work
Start by separating the result you need from individual tasks. More usable space, an updated room layout and a better commercial environment may each involve several services. List the essential changes first, then the improvements you would consider if the wider scope allows. This gives the enquiry a practical focus without requiring every product or finish to be selected at the outset.
A room-by-room schedule can help connect building work with the final fit-out. Note existing features being retained, products you intend to supply and areas that will remain occupied. Share available drawings and identify where technical design or assessment is still needed. Clear information helps distinguish a coordinated refurbishment proposal from a series of isolated product quotations.
Questions answered
Yes. Describe the connected work you have in mind, such as an extension alongside glazing or interior improvements.
No. You can begin with the location and a description of your ideas. Further information may be needed before the scope can be priced.
BSL offers commercial refurbishment and fit-out services alongside residential building work. Include the property use and operating constraints in your enquiry.
Call 020 3553 2214. The online enquiry form is being connected and is currently a preview only.
Yes. Explain your preferred priorities and the parts of the property that need to remain usable. Ask how the proposed stages relate to one another and which decisions must be made early. Staging should be agreed for the actual scope, including access, preparation and interfaces between building work and finishing trades.
Check the rooms, tasks and products included, together with assumptions, exclusions and undecided items. Confirm responsibility for supply, preparation, specialist assessment and making good. If the scope changes, ask for the implications to be described before agreement so the quotation remains a useful record of what is proposed.
London coverage
Discuss building services for properties across North, East, South and West London. Share your postcode, the work involved and any access requirements when requesting a free quotation.
Free quotations
From a single improvement to a larger refurbishment, start with your postcode and a few words about the work.
Email us: info@buildingservices.london